TY  - BOOK
AU  - Yelles.M.
ED  - Professional and Reference Book Division.
TI  - StudyGuide to the McGraw-Hill Encyclopedia of Science and Technology
SN  - 07-079798-6
PY  - 1960///
CY  - McGraw-Hill Book Company. 
PB  - New York
KW  - Encyclopedias & Books of Facts
ER  -